Do not open your computer or attempt any repair before reading and understanding the Read this first: Important safety information.
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek medical care immediately.
Prepare your computer. See Preparing your computer and removing the computer cover.
Locate the rear fan assembly. See Computer components.
Locate and disconnect the rear-fan-assembly cable from the rear-fan-assembly connector on the system board.


Connect the rear-fan-assembly cable to the rear-fan-assembly connector on the system board. See Parts on the system board.
To work with another piece of hardware, go to the appropriate section.
To complete the installation or replacement, go to Completing the parts replacement.